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A customer has 2 Servers at Hetzner in 2 Different IP subnets and in 2 Different Datacenters and asked me to modernize them. I would install a proxmox pve distribution on each server. Does someone have experiences if it is a good idea to cluster the servers in a pve cluster ? I could easily...

I have a Proxmox Backup Server in Data Center and would like to have a copy in another location. Proxmox Sync is no option, there is not enough online Bandwidth Tape also is no option, we will not invest again in tape technology I am taking a differential zfs snapshot on harddisk from...

I confirm, still the same problem qmp command 'query-pbs-bitmap-info' failed - got timeout also here ...

Thanks for inspiring me, this sounds like a good start. Yes the datastore is a zfs dataset. I am thinking about an initial zfs synchronisation on site and then only transferring differential snapshots. They should fit on an external drive for transport.

I still have the query-pbs-bitmap-info error even with my timeout modification and the newest 2.0.14 packages. My Backup Server is also not so slow, it is a 4 mirror 8 disk zfs raid 10 and even has zfs special devices on nvme. Also the server ist idle during backup time and not doing anything...

I have a Backup Server with around 30TB of Backup Data. I would like to take all Backups offsite once a week. Unfortunately the daily change of Backup Blocks are so many that we cannot replicate them online. I mean it would be complete overkill to have a 10 GBit/s Line only for replicating...

I applied the patch, now I get another error message. Yes, the Backup Server at Hetzner is a little slower than my servers in my own datacenter. But it is not really slow. () INFO: starting new backup job: vzdump 104 --node zw-pm-1 --mode snapshot --storage backups21 --remove 0 INFO: Starting...

Whats also new in my case is that I have my images on local-btrfs . @aaron, do you also use btrfs ?

Anyone found out what is the recommended setting of cache mode for vm images on btrfs ? none or writeback ?

i have a setup at hetzner with a pbs an 8 drive zfs raid10 Here every time when a vm is backed up to the backup server the vm will crash with io/errors and cpu stalls. If you need an environment to repdroduce the errors i can provide access to the setup

Same here, no Problems with fast backup server hardware and fast servers. But on a proxmox environment at a hoster i see the same. It seems that during backups blocks are locked for write until they are completely written to the backup server. If this takes too long vm will crash. On the vms i...

I have changed } else { $timeout = 3; # default to } else { $timeout = 8; # default in line 134 of /usr/share/perl5/PVE/QMPClient.pm , restarted the pve daemons for service in pvedaemon.service pveproxy.service pvestatd.service ;do echo "systemctl...

Same issue here, freshly installed backup server . all backups are working but i cannot backup one vm. Debugged for hours without any success INFO: started backup task 'f076c6d3-2cb2-4bca-bc7d-b87a765c3db6' INFO: resuming VM again ERROR: VM 103 qmp command 'cont' failed - got timeout

I had the same Problem. Solution was I added a mirror of small SSDs to the ZFS Datastore as "Special Device" , copied all backup data and deleted the original data. Afterwards the garbage collection was running in about 30 Minutes. Before I used the special Device it took about 20 hours.

Thanks for your ideas so far. I will play a little with the map function and see if it is fast enough ....

We would like to regularly keep backups of Data outside of the Building. The full datastore including history of all Backups of all Machines does not fit on external disks and is too much for Internet syncing. I would like to somehow export the latest image of each vm once a week to an external...

I was talking about this bug where data was backed up again although it did not change. https://forum.proxmox.com/threads/proxmox-backup-client-to-backup-photos-strange-deduplication-factor-and-long-backup-backup-time-after-some-days.85703/#post-376286 Is it possible to change some apt packages...

We also hit this bug and i downgraded kvm and libproxmox-backup qemu some days ago, no problems since then. Do you think I can update libproxmox-backup to a current version and just leave pve-qemu-kvm downgraded ? I ask because there was another bug fixed a few days ago that makes incremental...

Wow, I added a zfs special device on 2 mirrored datacenter ssds and populated it by duplicating the data into a new zfs dataset. Now my garbage collection on 8 TB backup data on a 9 spinning disk raid2z only took 20 Minutes instead of 18 hours before. The special device with the metadata has 30...

Thanks for your help Fabian, the idea to duplicate the zfs data and later rename seems to be a really good way. BTW: The lessons to always use Datacenter SSDs for Datacenter purposes we have learned many years ago.